813156925 has 24 divisors (see below), whose sum is σ = 1155140352. Its totient is φ = 556248000.

The previous prime is 813156923. The next prime is 813156941. The reversal of 813156925 is 529651318.

It is not a de Polignac number, because 813156925 - 2¹ = 813156923 is a prime.

It is a super-2 number, since 2×813156925² = 1322448369350911250, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (813156923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70035 + ... + 80815.

It is an arithmetic number, because the mean of its divisors is an integer number (48130848).

Almost surely, 2^813156925 is an apocalyptic number.

It is an amenable number.

813156925 is a deficient number, since it is larger than the sum of its proper divisors (341983427).

813156925 is a wasteful number, since it uses less digits than its factorization.

813156925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11229 (or 11224 counting only the distinct ones).

The product of its digits is 64800, while the sum is 40.

The square root of 813156925 is about 28515.9065260076. The cubic root of 813156925 is about 933.3792065747.

It can be divided in two parts, 8131 and 56925, that added together give a palindrome (65056).

The spelling of 813156925 in words is "eight hundred thirteen million, one hundred fifty-six thousand, nine hundred twenty-five".